Mager, Justin
Current rating: 1753 (#3721)
Record: 59-45 (GP) / 3-5 (professional)
| Grand Prix Seattle 2019 (MH1 limited) | starting rating: 1643 | |||
| round | table | opponent (rating) | result | Δrating |
| A1sealed | 513 | Leung, Douglas (1583) | Lost 1-2 | -191624 |
| A2sealed | 563 | Finn, Jason (1489) | Won 2-0 | +161640 |
| A3sealed | 379 | Flores, Charles (1623) | Won 2-1 | +171657 |
| A4sealed | 248 | Lew, Al (1511) | Lost 1-2 | -201637 |
| A5sealed | 283 | Vefa, Yusuf Kemal (1550) | Won 2-0 | +161653 |
| A6sealed | 196 | Cheng, Wei (1672) | Won 2-0 | +191672 |
| A7sealed | 114 | Caceres, George (1588) | Won 2-0 | +161688 |
| A8sealed | 108 | Woodson, Wyatt (1571) | Won 2-1 | +161704 |
| A9sealed | 519 | Cook, Megan (1619) | Won 2-0 | +161720 |
| draft | 109 | Sendaydiego, Curt (1439) | Won 2-1 | +131733 |
| draft | 154 | Chang, Robin (1687) | Won 2-1 | +171750 |
| draft | 65 | Sturm, Nate (1793) | Lost 0-2 | -171733 |
| draft | 58 | Miller, Spencer (1644) | Won 2-0 | +171750 |
| draft | 156 | Rideout, Vincent (1779) | Lost 1-2 | -181732 |
| draft | 122 | Gurney, Michael (1916) | Won 2-1 | +211753 |
| top | average opponent: 1631record: 11-4 | new rating: 1753 | ||
| Grand Prix Las Vegas 2018 (limited) (DOM limited) | starting rating: 1611 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 44 | Ayers, Calab (1500) | Won 2-0 | +161627 |
| 2sealed | 329 | Martinez, Matthew (1353) | Won 2-0 | +131640 |
| 3sealed | 167 | Thomas, Tommy (1523) | Won 2-1 | +161656 |
| 4sealed | 24 | Perez, Randy (1625) | Lost 0-2 | -191637 |
| 5sealed | 344 | Inada, Scott (1756) | Won 2-0 | +211658 |
| 6sealed | 169 | Kirkpatrick, Greg (1499) | Won 2-1 | +151673 |
| 7sealed | 58 | Kramer, Daniel (1697) | Won 2-1 | +181691 |
| 8sealed | 22 | Severa, Matt (2044) | Lost 0-2 | -121679 |
| 9sealed | 125 | Cocks, Ryan (1629) | Lost 0-2 | -191660 |
| 10draft | 1417 | Bowman, Peter (1662) | Lost 0-2 | -181642 |
| 11draft | 5121 | Vizaro, Justin (1650) | Lost 0-2 | -171625 |
| 13draft | 5037 | Aull, Katherine (1591) | Won 2-0 | +171642 |
| 14draft | 5033 | Salerno, Paul (1649) | Won 2-1 | +181660 |
| 15draft | 5027 | Bertoncini, Alex (1722) | Lost 1-2 | -171643 |
| top | average opponent: 1636record: 8-6 | new rating: 1643 | ||
| Grand Prix Vancouver 2017 (modern) | starting rating: 1611 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2194 | Shoemaker, Jacob (1500) | Won 2-0 | +161627 |
| 2modern | 2175 | Kushnirak, Jasper (1363) | Won 2-1 | +141641 |
| 3modern | 2015 | Wilson, Niall (1629) | Won 2-1 | +171658 |
| 4modern | 2024 | Wang, Haotian (1607) | Lost 1-2 | -181640 |
| 5modern | 2310 | Louke, Mary (1445) | Won 2-1 | +141654 |
| 6modern | 2083 | Stone, Tim (1519) | Lost 1-2 | -201634 |
| 7modern | 2294 | Nelson, Matt 6204 (1628) | Won 2-0 | +171651 |
| 8modern | 2117 | Aylward, Robert (1529) | Lost 0-2 | -201631 |
| 9modern | 2207 | Cifuentes, Dario (1511) | Lost 0-2 | -201611 |
| top | average opponent: 1526record: 5-4 | new rating: 1611 | ||
| Grand Prix Vancouver 2016 (OGW limited) | starting rating: 1542 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 52 | Fagnan, David (1535) | Won 2-1 | +171559 |
| 3sealed | 20 | Ellis, Bennett (1454) | Won 0-0 | +171576 |
| 4sealed | 52 | Sperling, Matthew (2070) | Lost 1-2 | -101566 |
| 5sealed | 202 | Sy, Jonathan (1541) | Won 2-1 | +171583 |
| 6sealed | 191 | Erickson, Chris R (1596) | Won 2-0 | +191602 |
| 7sealed | 112 | Brounstein, Jeremy (1572) | Won 2-1 | +171619 |
| 8sealed | 27 | Halverson, Alex (1594) | Won 2-0 | +181637 |
| 9sealed | 22 | Adderson, Russell (1605) | Lost 0-2 | -191618 |
| 10draft | 107 | Erickson, Chris R (1632) | Won 2-1 | +181636 |
| 11draft | 109 | Syed, Zan (1966) | Won 2-1 | +241660 |
| 12draft | 101 | Fleurant, Jason (1808) | Lost 0-2 | -151645 |
| 13draft | 124 | van Eeden, Jacques (1721) | Lost 1-2 | -171628 |
| 15draft | 92 | Ueda, Jay (1694) | Lost 0-2 | -171611 |
| top | average opponent: 1676record: 8-5 | new rating: 1611 | ||
| Grand Prix Seattle-Tacoma 2015 (legacy) | starting rating: 1559 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 259 | Martin, Ren (1517) | Won 2-1 | +171576 |
| 3legacy | 95 | Pastorinni, Luckas (1697) | Lost 0-2 | -161560 |
| 4legacy | 223 | Janz, Carl (1633) | Won 2-0 | +201580 |
| 5legacy | 192 | So, Kenny (1474) | Lost 0-2 | -201560 |
| 6legacy | 419 | Bennett, Brenton (1550) | Lost 1-2 | -181542 |
| top | average opponent: 1574record: 2-3 | new rating: 1542 | ||
| Grand Prix Las Vegas 2015 (2) (MM2 limited) | starting rating: 1546 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 121 | Nguyen, Thanh (1493) | Lost 1-2 | -191527 |
| 4sealed | 185 | Belknap, Randy (1512) | Won 2-0 | +181545 |
| 5sealed | 127 | Ponce, Delano (1527) | Won 2-0 | +181563 |
| 6sealed | 43 | Maloney, Kyle (1561) | Won 2-1 | +171580 |
| 7sealed | 16 | Marohl, Nate (1577) | Lost 0-2 | -181562 |
| 8sealed | 71 | Patel, Amit (1541) | Won 2-1 | +181580 |
| 9sealed | 47 | Gillam, Andrew (1575) | Won 2-1 | +181598 |
| 10draft | 33 | Jaskolka, Michael (1535) | Won 2-0 | +171615 |
| 11draft | 6 | Damo da Rosa, Paulo Vitor (2148) | Lost 0-2 | -91606 |
| 12draft | 87 | Friedman, Ben (1858) | Lost 0-2 | -141592 |
| 13draft | 46 | Maddock, Todd (1701) | Lost 1-2 | -161576 |
| 14draft | 131 | Williams, Miguel (1617) | Lost 0-2 | -171559 |
| top | average opponent: 1637record: 6-6 | new rating: 1559 | ||
| Pro Tour Fate Reforged (modern) | starting rating: 1564 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 181 | Martell, Tom (1881) | Lost 0-2 | -121552 |
| 2draft | 187 | Lotan, Raz (1544) | Lost 1-2 | -181534 |
| 3draft | 181 | Lu, Jiekun (1550) | Lost 0-2 | -181516 |
| 4modern | 201 | Farnung, Ian (1946) | Lost 1-2 | -111505 |
| 5modern | 200 | Moreno, Victor (1403) | Won 2-0 | +161521 |
| 6modern | 194 | Scheid, Daniel (1750) | Lost 0-2 | -131508 |
| 7modern | 182 | Wise, Gary (1644) | Won 2-0 | +201528 |
| 8modern | 159 | de Jong, Jasper (1532) | Won 2-1 | +181546 |
| top | average opponent: 1656record: 3-5 | new rating: 1546 | ||
| Grand Prix Portland 2013 (modern) | starting rating: 1525 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 204 | Hartman, Neil (1471) | Won 2-1 | +171542 |
| 2modern | 23 | Piggott, Michael (1518) | Won 2-1 | +181560 |
| 3modern | 11 | Falk, Coleman (1504) | Won 2-0 | +171577 |
| 4modern | 58 | Turtenwald, Owen (1962) | Won 2-1 | +251602 |
| 5modern | 17 | Bogner, Ryan (1696) | Won 2-1 | +191621 |
| 6modern | 9 | Brinkman, Garrett (1589) | Won 2-0 | +181639 |
| 7modern | 2 | Wijaya, Vidianto (2044) | Won 2-0 | +251664 |
| 8modern | 6 | Ricci, Joseph (1713) | Won 2-0 | +191683 |
| 9modern | 2 | Simon, Michael (1681) | Lost 0-2 | -181665 |
| 10modern | 17 | Nass, Matthew (1882) | Lost 0-2 | -141651 |
| 11modern | 43 | Stihle, Julien (1655) | Lost 0-2 | -181633 |
| 12modern | 32 | Bercovich, Brandon (1644) | Lost 0-2 | -181615 |
| 13modern | 44 | Sperling, Matthew (1871) | Lost 0-2 | -141601 |
| 14modern | 62 | Mitchell, Chris (1642) | Lost 1-2 | -171584 |
| 15modern | 59 | Leete, Aaron (1474) | Lost 1-2 | -201564 |
| top | average opponent: 1690record: 8-7 | new rating: 1564 | ||
| Grand Prix Vancouver 2012 (AVR limited) | starting rating: 1560 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 25 | Mayer, Kevin (1651) | Won 2-1 | +201580 |
| 5sealed | 29 | Calhoun, Robbie (1543) | Lost 0-2 | -191561 |
| 6sealed | 35 | Kurtin, Matthew R (1567) | Lost 0-2 | -171544 |
| 7sealed | 91 | Weizenbaum, Nathan (1530) | Won 2-0 | +171561 |
| 8sealed | 113 | Karila, Jamie (1582) | Lost 1-2 | -171544 |
| 9sealed | 91 | Erickson, Chris R (1535) | Lost 0-2 | -191525 |
| top | average opponent: 1568record: 2-4 | new rating: 1525 | ||
| Grand Prix Seattle-Tacoma 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 292 | Gingrich, Jonathan (1500) | Lost 1-2 | -181482 |
| 2sealed | 337 | Hill, Jacob (1482) | Won 2-0 | +181500 |
| 3sealed | 287 | Ames, Jason B (1588) | Lost 0-2 | -161484 |
| 4sealed | 494 | Russell, Greg (1406) | Won 2-0 | +161500 |
| 5sealed | 412 | Horyn, Chris P (1501) | Won 2-0 | +181518 |
| 6sealed | 225 | Hartman, Dan (1517) | Won 2-0 | +181536 |
| 7sealed | 214 | Long, Nate (1518) | Won 2-0 | +181554 |
| 8sealed | 109 | Ross, Stuart (1555) | Won 2-0 | +181572 |
| 9sealed | 110 | Preciado, Anthony (1554) | Won 2-0 | +181590 |
| 10draft | 56 | Barnes, Joel (1596) | Lost 1-2 | -181572 |
| 11draft | 35 | Engle, Woodrow (1571) | Won 2-1 | +181590 |
| 12draft | 56 | Kaff, Bryce (1601) | Won 2-0 | +181608 |
| 13draft | 69 | Beck, Josh (1613) | Lost 0-2 | -181590 |
| 14draft | 40 | Eleyet, Bryan (1911) | Lost 0-2 | -121578 |
| 15draft | 61 | Monson, Kyle (1622) | Lost 1-2 | -181560 |
| top | average opponent: 1569record: 9-6 | new rating: 1560 | ||